Add support for using the Jinja2 built-ins such as range

lib/ansible/utils/template.py

@@ -242,14 +242,18 @@ def template(basedir, text, vars, expand_lists=False):
 
 class _jinja2_vars(object):
     ''' helper class to template all variable content before jinja2 sees it '''
-    def __init__(self, basedir, vars):
+    def __init__(self, basedir, vars, globals):
         self.basedir = basedir
         self.vars = vars
+        self.globals = globals
     def __contains__(self, k):
-        return k in self.vars
+        return k in self.vars or k in self.globals
     def __getitem__(self, varname):
         if varname not in self.vars:
-            raise KeyError("undefined variable: %s" % varname)
+            if varname in self.globals:
+                return self.globals[varname]
+            else:
+                raise KeyError("undefined variable: %s" % varname)
         var = self.vars[varname]
         # HostVars is special, return it as-is
         if isinstance(var, dict) and type(var) != dict:
@@ -308,7 +312,7 @@ def template_from_file(basedir, path, vars):
     # This line performs deep Jinja2 magic that uses the _jinja2_vars object for vars
     # Ideally, this could use some API where setting shared=True and the object won't get
     # passed through dict(o), but I have not found that yet.
-    res = jinja2.utils.concat(t.root_render_func(t.new_context(_jinja2_vars(basedir, vars), shared=True)))
+    res = jinja2.utils.concat(t.root_render_func(t.new_context(_jinja2_vars(basedir, vars, t.globals), shared=True)))
 
     if data.endswith('\n') and not res.endswith('\n'):
         res = res + '\n'